The Hoops attacker last played for his country in March last year but is in Levein's squad for tonight's World Cup qualifier against Wales in Cardiff following the withdrawals of Robert Snodgrass and Jordan Rhodes.
29-year old Commons has scored four goals this term and after an absence from the Scottish team, is hoping he can bring some of his club performances, especially at Champions League level, to the international scene.
"It's great to be back again," he told scottishfa.co.uk.
"I have been keeping an eye on the squad during the time I have been out and the important thing was to keep playing as well as I could and I knew the opportunity would come. I am now just looking to grab it with both hands.
"I am playing with a lot of confidence and that has been reflected in the results we have had at the club, especially in the Champions League.
"Our whole pre-season was set-up to qualify for the Champions League group stages and I think our results and performances so far have given the whole of Scottish football a boost.
"We all want to reach the World Cup finals. It is a huge thing playing against the best players in Europe at club level in the Champions League.
"A lot of the players in the Scotland squad play in England against some of the best players in the world but as a country we all want to compete against the best nations at the World Cup finals, especially this one as it is being played on one of the real homes of football, Brazil."